Skyrim House Keeping/Downloading Hearthfire

I have purchased 2 different houses in the base Skyrim Elder Scrolls 5 Game. I want to download Hearthfire, but I am afraid of losing all of my stuff because I shoved a lot of stuff in there. Here is the question I am really asking.

If I download Hearthfire, will I lose my stuff?

Don't worry, your loot will be safe.

Hearthfire's new houses aren't actually in place of any of the houses that were there in vanilla Skyrim - instead, three areas of the countryside are converted into potential building sites for Homesteads.

Your purchased houses and their contents, therefore, won't be altered.